AZ-900 Practice Question 86: CDN Edge Caching
Microsoft Azure Fundamentals (AZ-900) · Test 9 · question 6 of 10
A website with visitors worldwide serves large amounts of static content (images, video, and JavaScript bundles) from a single origin server. The team wants that content cached closer to each visitor so it loads faster and the origin server handles less repeat traffic. Which service is built for this?
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Answer:
A content delivery network is a distributed network of servers that caches content at edge locations, called points of presence, close to end users, to minimize latency. Azure Content Delivery Network does exactly what the team wants: it caches static assets at nodes spread around the world so a nearby edge server answers repeat requests directly, which speeds up delivery for visitors and reduces the load that reaches the origin server.
Option B, ExpressRoute, is a private, dedicated connection between an on-premises network and Azure; it doesn't cache content or serve public website visitors at all. Option C, Traffic Manager, is a DNS-based load balancer that directs users to the best-performing *endpoint* (often across regions); it doesn't cache assets or store copies of content anywhere. Option D, VNet peering, connects two virtual networks so resources on each can communicate privately; it has no caching function and doesn't face the public internet.
Reference: What is a content delivery network?